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MACHINE DESIGN

Machine Design
The initial tension (in newtons) in a bolt used for making a fluid tight joint like steam engine cover joints, is calculated by the relation (where d = Nominal diameter of bolt in mm)

2840 d
1680 d
2080 d
1420 d

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Machine Design
In order to avoid tearing of the plate at an edge, the distance from the centre line of the rivet hole to the nearest edge of the plate should be equal to (where d = Diameter of rivet hole)

1 d
1.5 d
2 d
2.5 d

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Machine Design
According to Indian standards, total numbers of tolerance grades are

20
8
18
12

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Machine Design
The ratio of circumferential stress to longitudinal stress in a thin cylinder subjected to an internal pressure is

2
43832
1
4

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Machine Design
The most important dimension in the design of a nut is

Outside diameter
Inside diameter
Height
Pitch diameter

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